Add the chopped-potatoes into a large-pot and cover with water. Bring the water to a boil & cook potatoes till fork tenderfor 15-20minutes. Then drain potatoes.
Heat olive-oil in a bowl above medium-high heat. Add the bell-pepper, potatoes and taco-seasoning to the pan and toss to blend. Press potatoes down to the pan and turn heat to moderate.
Allow potatoes to cook for 5-7minutes without even bothering them. Lift a corner of the potatoes with a spatula, should crispy flip and cook for another 5minutes.
While the potatoes are cooking add the black-beans and refried-beans into a pan over moderate heat. Stir to blend. Once heated through, turn heat to low.
Prepare the Jalapeno Cilantro Sauce in Accordance with the directions and Put aside.
Wrap the tortillas in a paper-towel and then heat them in the microwave for 30seconds.
To assemble, put in a layer of beans to each tortilla followed by lettuce, avocado, potatoes and Jalapeno Cilantro Sauce. Serve with cilantro and lime wedges.